In Report Manager you can only view the subscriptions for the selected report. To see the schedule details to need to drill down another couple of screens.
Using Management Studio you are still stuck with looking at each individual report and then each subscription. At least when you bring up the properties for the subscription it's all within one dialog.
The following query will list the basic details about all the subscriptions in the ReportServer database. In the next iteration I hope to include more details such as file format, parameters selected, etc...
cat.path AS [ReportServerPath]
, own.username AS SubscriptionCreatedBy
, jb.date_created AS [SubscriptionCreatedOn]
, mod.username AS [SubscriptionModifiedBy]
, sub.ModifiedDate AS [SubscriptionModifiedOn]
, sub.Description AS [SubscriptionDescription]
, sub.EventType AS [SubscriptionType]
WHEN PATINDEX('%Recurrence%', sub.MatchData) > 0THEN 'Recurring'
ELSE 'Once Off'
END AS [ScheduleType]
, sch.LastRunTime AS [SubscriptionLastRun]
FROM msdb.dbo.sysjobs jb
INNER JOIN [ReportServer].[dbo].[Schedule] sch
ON jb.name = CAST(sch.scheduleid AS VARCHAR(40))
INNER JOIN [ReportServer].[dbo].[Subscriptions] sub
ON sch.eventdata = sub.subscriptionid
INNER JOIN [ReportServer].[dbo].[Catalog] cat
ON sub.Report_OID = cat.ItemID
INNER JOIN [ReportServer].[dbo].[Users] own
ON sub.OwnerID = own.UserID
INNER JOIN [ReportServer].[dbo].[Users] mod
ON sub.ModifiedByID = mod.UserID